no / intermittent audio, Kona 3 / Mac Pro

Perhaps someone seen this before and has a quick fix vs. nuking a local user profile.

Basically the audio goes off on a Mac pro with Kona 3 in a specific user profile only - in anything but FCP.

Is there a quick fix?

Thanks.

Additional details:

- FCP audio - always good
- any other audio (system sounds, QT clips) - mostly off (no audio), occasionally there's audio for a few seconds which then disappears
- audio output is routed through Kona 3 (AES -> mixer)
- when audio out is switched to internal speakers, no issue: audio is good
- issue persists through restarts
- issue does not persist in other user profiles: tried it in Admin user profile: no issue.
- last time that user worked in that edit bay was a few months ago

Determination:
- the issue is limited to that user ID only; likely could be fixed by wiping out local user configuration settings or perhaps local user profile altogether.

Alex.